Simultaneous mixing of starch and polymer brings significant cost savings
Exceptionally fast flash injection mixing of wet end additives questions old practices and opens possibilities to develop cost efficiency and sheet characteristics. Chaos type of immediate flash mixing of additives into stock flow of board, paper, tissue or non-woven line enables exploiting the additive efficiency with a maximal manner.
TrumpJet technology makes it possible to mix a wide range of reactive additive and chemical component pairs efficiently. As an example, mixing of strength starch and retention aid polymer simultaneously shows remarkable improvements.
Premixing and practically simultaneous injection of starch and cationic retention aid polymer into stock flow increases reactivity of the additives. The same sheet strength and retention level can be achieved with much smaller chemical dosages. Typically much lower use of flocculation additives results to better sheet formation. The both chemicals are mixed just prior to the headbox. Fast response time speeds up grade changes.
Fine paper line A, Europe
Cationic polymer (CPAM) and bentonite were added practically simultaneously just one after the other before headbox. Starch and ASA were flash mixed simultaneously before retention aid flash mixing stations. Before, starch and ASA were added to thick stock and CPAM before the screen and bentonite immediately after the screen
Good sheet quality, good runnability
CPAM saving at first 60%, later CPAM line was closed, saving 100%
ASA saving 15%
Starch saving 15%
Additional conclusion: Once strength starch is brought to close reach of headbox, starch also operates as retention aid and replaces the more expensive CPAM completely.
Large Fine paper line B, Europe
Strength starch and cationic polymer are premixed and injected simultaneously. Bentonite and micropolymer are premixed in a separate mixing station close by. The cationic and anionic mixing stations are located close to headbox feed manifold.
Starch saving 47%
CPAM saving 10...15%
Micropolymer saving 23%
Fresh water usage eliminated in the application
The fast flash mixing reactor opens the opportunity to bring new and conventional wet end additives close to headbox and forming section. This makes the system fast, responsive and efficient, chemical saving rate is high and influence to cut operational costs and improve profits is considerable and significant improvement in sustainability.
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